Question

the million song dataset (msd) includes main audio features and descriptive tags for popular songs.
audio features include acoustic traits such as loudness and pitch intervals.
many algorithms use these audio features to predict a new songs popularity.
these algorithms may fail to accurately identify main audio features of a song with varying acoustic traits.
algorithms based on descriptive tags that describe fixed traits such as genre are more reliable predictors of song popularity.

the student wants to explain a disadvantage of relying on audio features to predict a songs popularity. which choice most effectively uses relevant information from the notes to accomplish this goal?

choose 1 answer:

a algorithms based on audio features may misidentify the main features of a song with varying acoustic traits, making such algorithms less reliable predictors of popularity than those based on fixed traits.

b the msds descriptive tags are reliable predictors of a songs popularity, as the traits they describe are fixed.

c audio features describe acoustic traits such as pitch intervals, which may vary within a song, whereas descriptive tags describe fixed traits such as genre, which are reliable predictors of popularity.

d many popularity-predicting algorithms are based on a songs audio features, such as loudness and pitch intervals.

Explanation:

Analyze the student's goal

Using the Rhetorical Synthesis knowledge point:
The goal is to explain a disadvantage of relying on audio features to predict a song's popularity.

Evaluate the provided notes

• Note 3: Algorithms use audio features to predict popularity.
• Note 4: These algorithms may fail to accurately identify main audio features of a song with varying acoustic traits.
• Note 5: Algorithms based on descriptive tags (fixed traits) are more reliable.

Assess the answer choices

• (A) Directly explains the disadvantage: they may misidentify features of songs with varying traits, making them less reliable than those based on fixed traits.
• (B) Focuses only on descriptive tags, not the disadvantage of audio features.
• (C) Defines the features but does not directly state the disadvantage of the predictive algorithms.
• (D) Merely states a fact about what algorithms are based on, without any disadvantage.

Answer:

• (A) Algorithms based on audio features may misidentify the main features of a song with varying acoustic traits, making such algorithms less reliable predictors of popularity than those based on fixed traits. (Correct answer)
• (B) The MSD's descriptive tags are reliable predictors of a song's popularity, as the traits they describe are fixed.
• (C) Audio features describe acoustic traits such as pitch intervals, which may vary within a song, whereas descriptive tags describe fixed traits such as genre, which are reliable predictors of popularity.
• (D) Many popularity-predicting algorithms are based on a song's audio features, such as loudness and pitch intervals.